who we are

Stan is freedom-respecting, open-source software (new BSD core, some interfaces GPLv3) for facilitating statistical inference at the frontiers of applied statistics.

The Stan Development Team

The project is a team effort comprised of full time and volunteer developers from around the world.


Stan would not exist or continue to exist without the generous support of grants, foundations, and sponsors.

If you are interested in supporting the development of Stan then please see our support page detailing the ways in which you can contribute.


Stan is now linked to NumFOCUS, a U.S. 501(c)(3) nonprofit organization that serves several other open-source software projects, including NumPy, Julia, Jupyter, and others. For more details see

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